hot enough it would cook the bottle off if the bottle was closed if not most likly burn the hose and use nos as an accelerant but then so would the gas tank. If the neck was knocked off the bottle in an accident it would only lose the contents in the car since the bottle is bolted down in either case this is a one in a million what if and thought I am sure it has happend I would be willing to bet not more than once or twice.
